351646 has 8 divisors (see below), whose sum is σ = 530784. Its totient is φ = 174720.

The previous prime is 351643. The next prime is 351653. The reversal of 351646 is 646153.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 351646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (66348).

2³⁵¹⁶⁴⁶ is an apocalyptic number.

351646 is a deficient number, since it is larger than the sum of its proper divisors (179138).

351646 is a wasteful number, since it uses less digits than its factorization.

351646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106.

The product of its digits is 2160, while the sum is 25.

The square root of 351646 is about 592.9974704836. The cubic root of 351646 is about 70.5832893866.

Adding to 351646 its reverse (646153), we get a palindrome (997799).

It can be divided in two parts, 35 and 1646, that added together give a square (1681 = 41²).

The spelling of 351646 in words is "three hundred fifty-one thousand, six hundred forty-six".